Padlock



UNITED STATES PATENT OFFICE.

WILSIN BOI-IANNAN, OF BALTIMORE, MARYLAND.

PADLOCK.

Specification of Letters Patent No. 27,883, dated April 17, 1860.

To all whom 'it may concern:

Be it known that I, WILSIN BOHANNAN, of the city and county of Baltimoreand State of Maryland, have invented a new and useful Improvement inPadlocks; and I do hereby declare that the following is a full, clear,and exact description of the same, reference being had to theaccompanying drawings, formingl a part of this specication, in

Figure l, is a front view of my improved lock. Fig. 2, is a similar viewof the same with the face plate removed, the lock being shown unlocked.Fig. 3, is a similar view of the same, the lock being locked. Fig. 4, isa view of the key. Fig. 5, is a transverse section in the line and Fig.G, is a transverse section in the line y, y.

Similar letters of reference, in each of the several figures indicatecorresponding parts.

My invention does not consist broadly in the use of two bolts, one ofwhich acts as a stop to .the other after t-he lock is locked, but simplyconsists in the arrangement of two bolts which are constructed andpivoted together in a peculiar manner with two stationary guide stopsand two springs, arranged as hereinafter described, whereby I am enabledto have one bolt act as astop to the other and both serve to retain thehasp and at the same time avoid some of the complication which hasheretofore been deemed necessary to accomplish these objects.

To enable others, skilled in the art, to make and use my invention, Iwill proceed to describe its construction and operation.

A, represents the case of the padlock. B, is the hasp, O, the key-pin oraxis. These parts are constructed after the ordinary manner.

C', C', are the bolts and D, D', the guide stops in which they arearranged loosely. The lower bolt C, is pivoted to C', as shown at a, andis constructed with a shoulder at its rear end; with a curved nose orprof jection c, about midway of its length and with a bevel CZ, at itsfront end. The bolt C, is very similar in its construction to the boltC', it having a nose or projection c' and a beel CZ'. No shoulder isformed at its rear en F, F, are two scroll springs arranged on the samepin G, and made fast by one end to the same. The loose end of the springF, bears against the rear end of the bolt O',

while the loose end of the spring F', bears against the rear of the noseor projection c, as represented.

From the foregoing description, it will be seen that when the lock isunlocked, as shown in Fig. 2, the lower bolt will lie slightly diagonalto the upper bolt, and its shoulder will butt against the stop D. Now byforcing in the hasp B, itsbevel end will first act upon the bevel end(l, of the bolt C', and

force said bolt to the position shown in red, thus freeing its shoulderfrom the stop D'. This being done, the hasp acts upon both bolts andforces them together back through the guides formed by the stops. Assoon as the hasp is fully in the locking position, the bolts are causedto fly forward by the springs F, F', to their original posit-ion, and indoing so they enter the loop or slot of the hasp and thereby securelyretain it, and while this is accomplished, the upper bolt also isprevented from moving back when jarred violently for the lower bolt inassuming its original diagonal position abuts against the guide stop D,with its shoulder and thus renders impossible any longitudinal movementfrom said cause. Then it is desired to unlock the lock, all that has tobe done is' to lapply the key and turn it in the ordinary manner. In themovement of the key, the nose or proj ect-ion c, of the lower bolt isfirst moved from the position shown in full red lines in Fig. 3, to theposition shown in dotted red lines in same figure; and thus the shoulderZ), of the same moved from its position in front of the stop D; now bycontinuing to turn the key, both bolts will be forced back together asthey are pivoted to one another, and the hasp will be released.

Vhat I claim as my invention and desire to secure by Letters Patent, is*

Arranging the bolt C', on top of the bolt O, and pivoting the twotogether by means of a pivot a., and controlling the operation of thesame by means of the two guide stops D, D', and two springs F, F', inthe manner and for the purposes described.

The above specification of my improved padlock is signed by me this 19thday of January 1860.

wILsIN i BOHANNAN.

Vitnesses:

GOODWIN Y. AT LEE, It. W. FENWICK.

